Probe of anomalous neutrino couplings to W and Z in medium energy setup of a beta-beam facility

TL;DR

This paper investigates how a medium energy beta-beam setup can constrain anomalous neutrino couplings to W and Z bosons, providing significantly tighter limits than current bounds using an effective Lagrangian approach.

Contribution

It demonstrates that a beta-beam facility can set 3 to 20 times more restrictive limits on neutrino-gauge boson couplings than existing experiments, without assuming flavor universality.

Findings

Beta-beam setup improves limits on neutrino couplings by up to 20 times.

Effective Lagrangian approach used to derive confidence level bounds.

No assumption of flavor universality in neutrino couplings.

Abstract

Capability of medium energy setup of a beta beam experiment to probe new physics contributions to neutrino-W and neutrino-Z couplings are investigated. We employ the effective lagrangian approach of Buchmuller and Wyler and obtain 95% confidence level limits on neutrino couplings to these gauge bosons without assuming the flavor universality of the coupling of neutrinos. We show that a beta beam facility can place 3 to 20 times more restrictive limits than present ones on the deviations from the electron neutrino couplings in the Standard Model.